Large & Secure Storage: The capacity of the large code key box is large enough (inner size about 4.5 * 3.7 * 2 inches) to place house keys, office keys or other large car keys; And you can also store some small things if necessary, such as credit cards, ID cards etc. Two Unlock Modes: This code key safe has a 4-digit digital code and emergency button; It can set up to 10,000 combinations at most. You can set your own access code and change it regularly to improve security, making it difficult to crack. The emergency buttons can be more convenient when you forget the code! Easy to Install: This outdoor key safe comes with 4 screws and 4 nylon expansion wall anchors to ensure that the code key box can be mounted on any solid surface. No fuss or extra work needed to have a box drilled into the wall at much more expense. Solid Construction: Our wall mounted key box is made of durable aluminum alloy, resistant to water, corrosion and weather. Perfect for outdoor mounted. Wide Application: